It makes the most sense that the RME, modded or not, is in all likelihood not equal to a Meridian CDP, and that these Toshibas are in all likelihood not equal to the RME, though I wouldn't mind trying one for myself. The reasoning to me is that only a small portion of the cost of the $60 DVD player is devoted to the audio section, as it must be shared with the video, transport, PSU, case, remote, etc.; as comapred to a $300 audio card whose only purpose (and expense) is audio. It seems more likely to me that the Toshibas would likely compare to a lower-cost section of soundcards like the AP24/96 or Revo.
It is also totally possible that I am wrong, but I guess we will never know until someone does a head-to-head.